Abstract
The effects of different solvents on the fabrication of organic photovoltaic cells by gravure printing are reported. Polymer bulk heterojunction solar cells were fabricated with ITO/PEDOT: PSS/P3HT: PCBM/Al layer structures using 4–9 wt% mixtures of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61 butyric acid methyl ester (PCBM) in 1,2-dichlorobenzene to optimize solution viscosity for gravure printing. 7 wt% P3HT: PCBM showed optimal efficiency of 1.64% and resulted in an active layer 340 nm thick. Three solvents, 1,2-dichlorobenzene, chloroform, and chlorobenzene, were tested and a 1: 1 ratio mixture of 1,2-dichlorobenzene and chloroform resulted in the best efficiency of 2.21%. This study demonstrates the importance of solvent effects in the gravure printing of organic photovoltaic devices.
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Lee, J., Kim, A., Cho, S.M. et al. Solvent effects on gravure-printed organic layers of nanoscale thickness for organic solar cells. Korean J. Chem. Eng. 29, 337–340 (2012). https://doi.org/10.1007/s11814-011-0174-6
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DOI: https://doi.org/10.1007/s11814-011-0174-6